... arXiv.org . astro-ph . ... We fit the near-infrared to radio spectral energy distributions of 30 luminous and ultra-luminous infrared galaxies with pure starburst models or models that include both starburst and AGN components to determine important physical parameters for this population of objects. In particular we constrain the optical depth towards the luminosity source, the star formation rate, the star formation efficiency and the AGN fraction. ...

... This page includes download links to all the videos as well as some plugins you may need to view the videos on your computer. ... Click on a link to view the video, or right-click (PC)/control-click (Mac) the link to download the file to your computer. ... Videos Plugins: . You will need the most up-to-date video-playing software on your computer. ... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...

... Star Atlas . ... First high-resolution image of the young binary star Theta 1 Orionis C . ... A team of astronomers, led by Stefan Kraus and Gerd Weigelt from the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn, Germany, used European Southern Observatory's (ESO) Very Large Telescope Interferometer (VLTI) to obtain the sharpest image of the young double star Theta 1 Orionis C in the Orion Trapezium Cluster. ... The new image clearly separates the two massive young stars of this system. ...

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